Lamp base



FIGS. 1 and 2 are perspective views of a lamp base, showing our new design;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a right side view thereof, the opposing left side view being a mirror image;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIGS. 8 and 9 are perspective views of a second embodiment thereof;

FIG. 10 is a front view of FIG. 9;

FIG. 11 is a back view of FIG. 9;

FIG. 12 is a right side view of FIG. 9, the opposing left side view being a mirror image;

FIG. 13 is a top view of FIG. 9; and,

FIG. 14 is a bottom view of FIG. 9.

The broken lines shown in the drawings are included for purposes of illustrating environment or portions of the lamp base and form no part of the claimed design. 

CLAIM The ornamental design for a lamp base, as shown and described. 